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Patent Searching and Data


Title:
IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/112227
Kind Code:
A1
Abstract:
A beam splitter (BS2) reflects a portion of light emitted from a first image projection unit (s1) in a first direction and transmits a different portion of the light in a second direction. A first retroreflection unit (RR1) retroreflects the light reflected in the first direction toward the beam splitter (BS2). A second retroreflection unit (RR2) retroreflects the light transmitted in the second direction toward the beam splitter (BS2). The beam splitter (BS2) transmits the light retroreflected by the first retroreflection unit (RR1) toward an image-forming optical unit (DM) and reflects the light retroreflected by the second retroreflection unit (RR2) toward the image-forming optical unit (DM).

Inventors:
OGATA YOICHI (JP)
Application Number:
PCT/JP2020/045267
Publication Date:
June 10, 2021
Filing Date:
December 04, 2020
Export Citation:
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Assignee:
KOITO MFG CO LTD (JP)
International Classes:
G02B30/00; B60K35/00; G02B27/02; G09F9/00; G09F9/30; H04N5/64; H04N13/346; H04N13/395
Foreign References:
JP2015040944A2015-03-02
JPH11109279A1999-04-23
JP2010220074A2010-09-30
US20120188619A12012-07-26
Attorney, Agent or Firm:
SHIN-EI PATENT FIRM, P.C. (JP)
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